Blasting cap primer composition



UNITED STATES TENT ()FFICE Apctin Jannary 10, 192, Serial No, 426,319

This invention fe1ateS to a neW and im roved blaSting cap, and Inofe paI'ticulafly to capS c0n taining aJ nove1 explosive charge of desifab1e ropefties- It is weH-known that the blasting oops of the fior aft, and the explosive char es fo1 the same hve certain denite liInjtations and diSadvan ta es. n articulaf, thoSe skilled in the art are feady to Tecommend any inlpfoveInents fron1 the standpoint of safety fooerties.

An object of the resent invention is 3 new and ifn foved blastifl oa containin a nove1 ex losive charge. A forther object is a blasting co containiog 3- new ty e of oharge and chafac tenzef1 by ifnproved Safety pfopeftieS. Addition a1 objects Wi11 be disolosed as the invention iS de- Scfibed further hefeinafter have found tha the fofegoing ObectS are accon1plished Wheh en1p 1oy aS an exploSive char e in a blastin ca a nitrated afnide of a hydrox a1i hatic acid. Prefefb1y, this ooInound Wi11 be uSed aS a pIiInafy Cha1 ge, but it Inay also function as base charge of aS a oftion of tho i nition cofn osition.

A number of an1ides of hydrox ali hatio acid5 ield nitratio roducts of attfactive To eIfieS. As exoInpes of such nitfated an1ides of hydfoxy n1onocarboxyHc acids may cite the pfeparation of NntT0-Nmethy1 hydfoxyacetaInide nitfate from N-methy1 hydfoxyacetamide from c2(oH) co N c3; N-ethano1 h drox aoetamide dinitfate froIn N-ethano1 h droxyacetande gluconaInide pentanitTate froIn gluconan1ide CONI2(cIoNo2) 4cf2ONo2] froIn coNH2-(co) cH2oI kewise ffoI aliphatic dicarboxy1ic aoids may be prepared N,N dintfo-N,N dimethy1 oxamide frem diTnethy1 0Xamide coN(No) cI32 from coNHcH32; N,N-diethano1 0xan1- ide diniorate ffom N,N-diethano1 oxamide c oN-cH2cH2oNo2 2 ffon1 N ,Ndi1T1ethy1 InucaInide tetranitrate fron1 1,,1 din1ethy1 InucaInide N,1`T diethano1 InucoInide hexonifrate fron1 N,N-diethano1 mucamide and others. In the case of the derivativeS of the dioofboxyHc acids, hovever, od it desifable to liInit Iny invention to the Ilitration products of an1ides of aliphatic hydfoxy dicarboxylic acids containin mofe than two hydroxy1 gfoups.

t is wen reco nized in the litefature that oaf bonio aoid is not a tfue hydfox acid. Accofdin l feference to acids in the present ap Hcation does not inolude cofbonio acid.

1/f invention ma be undersood fufther b fefefence to the accompanying dfang, Which is to be taken b Wa of illustration onl and not as lin1iting the sco e of said invention. In the drawing, l fepresents a blasting oap She11 of SI1it able metal and of the customary oylindrical shape, 2 deSignateS a baSe charge of pentaefythfito1 tetfanitrate, 3 a pfifflary ohafge of 1`T- n1ethy1 gluconaTnide pentanitfate, and 4 an ig nition ohaTge coInpfiSing a gfained fnixture of diazodinitfophenol With NTnethy1 g1uconTnide pentanitTate. This ignition n1ixture nlay be Ted by the spit of a fuSe insefted into the upper paft of the cap She11 and criInped tightly thefeto, of a1tefntive1y by Ineans of al hot Wire as in the oonventiona1 electric bfstin oapS, in vhich case the Inouth of the she11iS c1osed about leg WireS by any conventional c1osure n1eans.

The follovving exaInples show specific en1bodi Inents of the applioation of n1y invention to b1aSt ing caps, the oonlpositions ShoWn giving SatiSfac tofy execution. conventional ignition ohafges were eInployed in a11 cases where the type iS not indicoted.

4 invention. XKh ile in n1any cases it Wi11 be en1 ployed in connection With caps adapted for ignf tion by IneanS of a fuse, it is applicable also for electric blaSting capS, delay capS, and the like.

5 intend to be lifnited thefefofe only by the fo1- lovving patent c1aiInS.

clain1:

L A blasting oap oontaif1ing a base charge of pentaerythTito1 tetTanitfate, av priIner ohafge conlprising N-Inethy1 gluconan1ide pentanitrate,

and an ignition coInposition ooInprising diazo dinitropheno1 grained With 1`T-Inethy1 gluconaInide pentanitrate.

2. A blasting cap containing a baSe charge of aJ Secondary explosive, a pfiInef charge ooInpfis ing a 11itfated aInide of aI1 acid ffon1 the gfoup conSisting of the aliphatic hydfoxy Inonocaf boxy1ic acids and those aHphatic hydroxy dicaf boxylic acidS oontaining Inofe than tvvo hydfoxy1 groupS and an ignition oonlposition oon1prising Base chaTge f,Tin1afy ohage E Ignition charge 1 N tr(NIneth 1 hydroxyaoetan1ide Lead oZide 1. 0

2 IT-111ethy1 glooonan1ide pentanftTote 4 1)iazodinitropheDoL 2 5 3 (}luoon8Inide pentaniffote IJead Hzide 2- 0 5 PentaetythTito1tetTanitrate 4 IT-Ilethy1 glueon- 1. 0 ])iazo(11n1tTOpheno1 gfaIned Wlth nltronannxte1 gfaIn.

a111ido pentanittate.

6 ,`do 4 San1e I)iRzodlnltropheno1 gralned v71th NIIethy1 glllooIlan11de pentaitrate'1.5 gfainS.

fitol tetTanitfate. I fLnd said cap to have out o standing pfopefties, paftioularly vVhen a gfained blend of said NInethy1 g111conaIT1ide pentanitfate and diazodinitropheno1 iS enp1oyed aS ignition agent.

In my copending appHoation Seria1 No. 2 903, filed 1)ec. 30, 19L have olaiTned. theSe aInideS as new chexnica1 and exploSive conlpounds.

have deScribed Iny invention of length in the fofegoing, but if will be undefstood that many vaTiations Inay be introduced in con1positions and details Without departure from the Scope of Said diazodinitropheno1 grained vvith one of Said nf trated aInides.

3. A blasting oap oontaining a baSe oharge of a Secondafy explosive, a prin1er charge con1pffs ing a nitfated afnide of an acid ffoIn the group conSiSting of aliphatio hydroxy fnonooarboxylic acidS and those aliphatic hydfoxy dicarboxylic acids containiI1g n1ofe than two hydfoxy1 gfoupS, and an ignition ooInpoSition diSposed above said priIner charge.

The blasting cap of olaiIn 3 wherein Said pfin1ef ch aTge coInpfiSes fT-Inethy1 gluconan1ide pentanitfate.

' 5. The blasting cap of claim 3 Wherein said pfiInef chafge coInpiSeS fT-nitro-1T-Inethy1 hydfoxyacetan1ide nitrate.

6. The blaSting cap of olaiIn 3 Wherein said pfimef ohafge coInprises N,N-diInethy1 mucamide tetTanitTate, 

